Question 836428
average score = ( total of all scores ) / ( number of students )
Let {{{ x }}} = the total of all scores
{{{ 84 = x / 25 }}}
{{{ x = 2100 }}}
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Total for 6 students is {{{ 6*100 = 600 }}}
Total for 7 students is {{{ 7*60 = 420 }}}
{{{ 600 + 420 = 1020 }}}
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{{{ 25 - ( 6 + 7 ) = 25 - 13 }}}
{{{ 25 - 13 = 12 }}}
There are 12 remaining students
whose total score is {{{ 2100 - 1020 = 1080 }}}
Average of remaining students is {{{ 1080 / 12 = 90 }}}